feat(mbedtls): update mbedtls to version 3.6.3

Signed-off-by: Lauren Wehrmeister <lauren.wehrmeister@arm.com>
Change-Id: I4bfb546c351c30a6fc4d22f29bc03efad316df7d
(cherry picked from commit d5bb5f6c82f7ebcf28dccbbfad058e27e207c14f)
diff --git a/include/configs/tftf_mbedtls_config.h b/include/configs/tftf_mbedtls_config.h
index 77e7ba9..9ad0b71 100644
--- a/include/configs/tftf_mbedtls_config.h
+++ b/include/configs/tftf_mbedtls_config.h
@@ -21,8 +21,8 @@
 /* For snprintf function declaration */
 #include <stdio.h>
 
-/* This file is compatible with release 3.6.2 */
-#define MBEDTLS_CONFIG_VERSION         0x03060200
+/* This file is compatible with release 3.6.3 */
+#define MBEDTLS_CONFIG_VERSION         0x03060300
 
 /* Configuration file to build mbed TLS with the required features for TFTF */
 #define MBEDTLS_PLATFORM_MEMORY